Slip-sheet apparatus



60%. 15, 1940. A POTDEVIN I 2218,21?

SLIP-SHEET APPARATUS I Original Filed March 9, 1937 INVENTOR I Wm BY M, *4 ATTO Patented Oct. 15, 1940 an STATES 2,218,217 snr-snnn'r APPARATUS Adolph Potdevin, Garden City, N. m, assignor to Potdevin Machine Company, Brooklym N. Y., a corporation of NewYork Original application March a, 1937, Serial No.

129,787. Divided and this 29, 1939, Serial No. 264,691

4 Claims.

This application, which is a division of my copending application Serial No. 129,787, filed March 9, 1937, Patent No. 2,158,552, dated May 16, 1939, relates to an improvement in machines for handling material, such as paper, for example, which is fed in a continuous length into the machine, cut ofi, printed and collected, a sheet of material commercially termed a slipsheet being inserted between adjacent superim- 1c posed lengths of printed material .to prevent offset printing.

' In the accompanying drawing? Fig. 1 is a. fragmentary part sectional eleva'- tional view of an embodiment of my invention;

Fig. 2 is a view taken on the line 22 of Fig. 1;

Fig. 3 is a detail of the gripper and pin arrangement employed.

Referring to the drawing in detail: 2 designates a roll of slip-sheet material.

The slip-sheet material is continuously drawn from this roll and about idler roller d by a pair of driven forwarding rollers 6. The forwarding rollers 6 advance the slip-sheet material to perforating rollers 8 where the material is perforated. The division of theslip-sheet material into lengths is accomplished by the overspeeded rollers Ill, one of which is segmental, these rollers exerting a longitudinal strain on the material at the proper instant to rupture the material along the line of perforations therein. The rollers Ill advance the forward end of the slip-sheet to beneath curved "guide I 2. V.

is designates a pair of chains which convey :15 the bags It or other material through the printing mechanism (not shown) where the desired printing is applied. These chains are equipped with grippers l8 coacting with flat faced rods 20.

The grippers are carried by rods 22 spanning the chains [4. These rods are equipped with springs 28 for closing the grippers.

The flattened rods 20 which cooperate with the grippers or gripper jaws I8 are provided with pins 26 extending vertically with respect to the plane of the chains I4 and beyond the outer face of these chains. As the chains l4 move from left to right, as viewed in Fig. 1, with the printed bags l6 held thereto by the grippers 18, the leading end of each bagfinally reaches a position-be neath the curved plate I2. The machine is so timed that at this same instant the leading end of a slip-sheet 28 will have been fed beneath the curved plate l2, and as the ship-sheet and chains l4 advance the leading end of the slip-sheet will be impaled upon the pins 26, so that a slip-sheet application March 28 and a bag .19 will be attached to the chains It with the end of the slip-sheet lying upon the jaw of the gripper 18. This is shown in full lines in Fig. 3.

The bags and slip-sheets are to be deposited 5 upon a conveyor 30 which is traveling transverse- 1y of the chains 14, and adjacent the right hand side of this conveyor, as viewed in Fig. 1, is a stop 32 adapted to engage a tall 36 on the grippers 19 to open the same. It will be quite evident that it) as a gripper is opened 'its jaw will push the slip-sheet oii the pin 26, as illustrated in Fig. 3-, so that the bag and slip-sheet will fall in superimposed relation upon the conveyor 30. If desired a kicker bar 36, which corresponds to the 15 kicker bar of my copending application, above referred to, may be employed.

Reverting to the plate 12, it will be seen from Fig. 2 that the same is slotted as shown at 38.

It is to be understood that changes may be made in the details of construction and arrangement of parts herein described without departing. from the spirit and scope of my invention.

What I claim is: 1. In a .machine of the class described, the combination of a conveyor, a carrier for delivering freshly printed lengths of sheet material successively to said conveyor, means for supplying slip-sheets successively to said carrier, attaching means for attaching the printed lengths succes- 3 sively to said carrier, attaching means for attaching the slip-sheets successively to said carrier in superimposed relation to the printed sheets and the first mentioned attaching means, and opening means for said first mentioned attaching means 35 i to release the printed lengths successively from the carrier and at the same timepositively detach the slip-sheets from'the carrier, for deposit of the printed sheets and slip-sheets alternately in superimposed relation upon the conveyor.

2. In a machine of the class described, the combination of a carrier adapted to receive freshly printed sheets, gripper jaws carried thereby for attaching the freshly printed sheets thereto, pins carried by said carrier, means for delivering slip-sheets to said carrier to become impaled upon said pins, with the slip-sheet superimposed with respect to the freshly printed sheet and the closed gripper jaws, and opening means for the gripper jaws adapted to open the same to release the printed sheets and at the same time force the slip-sheets off of the pins.

3. In a machine of the class described, the combination of a carrier for freshly printed sheets, gripper jaws for attachment of the sheets in to the carrier, pins carried by said carrier adjacent the gripper jaws, means for dividing a web into slip-sheets and for forwarding the slipsheets to the said carrier, aplate in the path ofv 18 sheets. gripper laws for attachment of the sheets -to the carrier, pins carried by said carrier intermediate said iaws, slip-sheet forming mechanism for dividing web material into slip-sheet lengths,

forwarding rollers for forwarding the slip-sheets, a curved plate overlying said carrier and slotted to accommodate said pins, said plate deflecting the advancing slip-sheets to impale the same successively upon said pins in superimposed relation to said gripper jaws,-a stop in the path of said grippers for opening the same to release the printed lengths and to strip the slip-sheets from said pins, and a conveyor moving transversely of said carrier for receiving the released printed sheets and slip-sheets.

ADOLPH POTDEVIN. 15 

